function: new Bluetooth solution, better Bluetooth decoding effect, support TWS true wireless pairing function, support remote firmware .Treble & and Subwoofer Controls: With subwoofer volume controls, L and R channels Treble & independently controllable. -in low-pass filter for subwoofer with sub-frequency control, small simple compact design but practical and .Bluetooth and AUX inputs: almost with all home audio devices such as smartphones, , MP3, PC, CD players, etc. Enjoy acoustic surround audio with the speaker.: TB22chip:TPA3116D2Input Mode: BluetoothWork Voltage: DC 12V-24V(Above 2A)Channel: 2.1 Stereo OutputBluetooth version: Bluetooth 5.1Bluetooth transmission distance: 10m(If you need to go further, please the antenna yourself)MAX Output: 50W x 2 +100Wtype:Amplifier Boardcolor:BlackMaterial:plasticsize:121 x 100 x 26mmPackage Contents:1 x TB22 Bluetooth Amplifier BoardOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.